GUI: Mute option
Would it be possible to add some sort of mute option (and maybe a keyboard shortcut) to mute all the sound in ScummVM? I know I can just go in and fiddle with all the volume settings, but having to do this every time I decide I want to mute/unmute the volume will probably get somewhat annoying.
Rather than having to go in and change a load of code to make it check whether the volume is muted, you could make it so that when the mute option is selected all the current volume levels are put in temporary variables and then set all the volumes to zero.
Ticket imported from: #1180217. Ticket imported from: feature-requests/238.